AS/NZS 1163


AS/NZS 1163 Hollow Section

Discover the pinnacle of structural integrity with our AS/NZS 1163 certified steel hollow sections. Designed for the most demanding structural and engineering applications, these cold-formed, electric resistance-welded steel hollow sections offer unparalleled strength and durability. With three distinct strength grades and optional impact properties, our product range is tailored to meet your specific needs. Weldability comes standard, as these sections are formed cold without any subsequent heat treatment. When you choose our AS/NZS 1163 steel hollow sections, you’re not just buying a product; you’re investing in a solution that brings reliability, longevity, and peace of mind to your projects.

AS/NZS 1163 Specification

When it comes to specifications, our AS/NZS 1163 steel hollow sections leave no room for compromise. The dimensions are meticulously crafted to meet industry standards, ensuring a perfect fit for your structural needs. Our production procedures adhere to rigorous quality controls, guaranteeing a product that stands the test of time. You have the flexibility to choose from various steel grades, surface coatings, end types, and joint methods. Additionally, we offer a range of machining services to customize the product to your exact specifications. With us, you get a product that is not just compliant but also customizable to your unique requirements.

Production StandardAS/NZS 1163
Manufacturing ProcessesERW(CHS)
Outside Diameter13.5mm -610mm   20*20-400*400mm
Wall Thickness2.3mm – 12.7mm     1.6-16mm
Pipe LengthRandom: 4- 16mtrs
fixed length be specified at time of order.
Steel GradeC250 C250L0C350 C350L0C450 C450L0
Corrosion PreventionNOPC. Lacquer, Varnish, Oiling, Galvanizing
End ProcessesSquare Cut, Bevelling, Threading, Grooving
Further ProcessingWelding, Bending, Hole Drilling, Punching, Swaging, Tapering, Flaring, Expanding

AS/NZS 1163 Dimension Table


Understanding the dimensions of our AS/NZS 1163 steel hollow sections is crucial for your project’s success. Our comprehensive dimension table provides all the information you need, from external diameters to wall thicknesses. Each measurement is carefully calibrated to ensure optimal performance and fit. With our dimension table at your disposal, you can easily plan and execute your projects, knowing that each section will align perfectly. Trust us to provide you with steel hollow sections that meet your dimensional requirements to the letter.

Outside Diameter (mm)Circular Hollow Sections Wall Thickness (mm)
Size(mm)Rectangular Hollow Sections Wall Thickness (mm)
50 x
50 x
65 x 352.02.53.0
75 x
75 x 502.
100 x 502.
125 x 753.04.05.0
150 x 503.04.05.0
150 x 1004.05.06.0
200 x 1004.
250 x 1505.06.09.0
Size(mm)Square Hollow Sections Wall Thickness (mm)
20 x 201.6
25 x
30 x 301.62.0
35 x 351.
40 x 401.
50 x 501.
65 x 652.02.53.0
75 x 752.
89 x 893.55.06.0
100 x 1003.
125 x 1254.
150 x 1505.06.09.0
200 x 2005.06.09.0
250 x 2506.09.0

Chemical Requirements of AS/NZS 1163

When it comes to the chemical composition of our AS/NZS 1163 steel hollow sections, we adhere to stringent guidelines to ensure maximum strength and durability. Each element, from carbon to manganese, is carefully balanced to provide you with a product that resists corrosion, withstands high pressures, and maintains structural integrity under various conditions. By choosing our steel hollow sections, you benefit from a product that meets all chemical requirements, giving you the confidence to proceed with your most ambitious projects.

Grades (see Note 1)Chemical Composition (cast or product analysis) (see Note 2) % max.
CSiMnPSCrMoAl (see Note 3)TiMicro-alloying elementsCE (see Note 4)
C250, C250L00.120.050.500. (see Note 5)0.25
C350, C350L00.200.251.600.030.030.300. (see Note 6)0.43
C450, C450L00.200.25 (see Note 7)1.700.030.030.300.350.100.040.15 (see Note 6)0.43
  • 1       The use of sulphide modification manufacturing techniques for these grades is permitted .
  • 2       The following elements may be present to the limits stated:
  • (a)        Copper            0 .25% .
  • (b)         Nickel             0 .25% .
  • 3       Limits specified are for soluble or total aluminium .
  • 4       Carbon equivalent (CE) is calculated from the following equation:
  • 5      Applies to niobium and vanadium only . However, niobium greater than 0.010% is not permitted.
  • 6      Applies to niobium, vanadium and titanium only . However, vanadium greater than 0 . 10% is not permitted .
  • 7      For circular hollow sections (CHS), the silicon limit shall be 0.45.

Mechanical Requirements of AS/NZS 1163

Mechanical properties are at the heart of any structural material, and our AS/NZS 1163 steel hollow sections are no exception. From tensile strength to yield strength, each mechanical attribute is optimized to offer you unparalleled structural integrity. Whether your project involves heavy loads or dynamic forces, our steel hollow sections are engineered to withstand the most challenging conditions. With us, you get a product that not only meets but exceeds mechanical requirements, ensuring your projects stand strong for years to come.

GradeMinimum Yield StrengthMPaMinimum Tensile StrengthMPaMinimum Elongation as a Proportion of  The Gauge Length of 5.65√So  (see Note) %
Circular Hollow Sections do/tRectangular Hollow Sections b/t, d/t
≤15>15≤ 30>30≤15>15 ≤30>30
C250, C250L0250320182022141618
C350, C350L0350430161820121416
C450, C450L0450500121416101214
NOTE:These limits apply to the face from which the tensile test is taken. That is, for RHS, the use of  b/t or d/t  ratio  is  dependent  on  which  face  the  test  specimen  is  cut  from.  For  SHS,  there  is  only  one  ratio (as b = d).
GradeTest temperature °CMinimum absorbed energy, J
Size of test piece
10 mm  ×   10 mm10 mm ×   7.5 mm10 mm  ×  5 mm
Average of 3 testsIndividual testAverage of 3 testsIndividual testAverage of 3 testsIndividual test
C250L0 C350L0 C450L00272022161813

Steel Grades of AS/NZS 1163

Choosing the right steel grade is crucial for the success of your project, and our AS/NZS 1163 steel hollow sections offer a range of options. From C250 to C450, each grade is designed to meet specific structural needs. The “L0” designation indicates that the steel meets the 0 impact test requirement, providing additional assurance of durability. With us, you have the freedom to select the steel grade that best suits your project’s demands, ensuring optimal performance and longevity.

Production Tolerance ofAS/NZS 1163

CharacteristicCircular hollow sectionsSquare and rectangular hollow sections
External dimensions (do, d and b)±1%, with a minimum of ±0.5 mm and a maximum of ±10 mm±1%, with minimum of ±0.5 mm
Thickness (t)For do £ 406.4 mm: ±10% For do > 406.4 mm: ±10% with a max of ±2 mm±10%
Out-of-roundness (o)±2% for hollow sections having a diameter to thickness ratio not exceeding 100 (see Note 1)
Concavity/convexity (see Note 2)Max. 0.8% or 0.5 mm, whichever is greater
Squareness of sides90°±1°
External corner profileSee Table 5
Twist (v)2 mm + 0.5 mm/m length
Straightness (see Note 3)0.20% of total length0.15% of total length
Mass (m) per unit lengthNot less than 0.96 times the specified mass (Note 4) on individual lengths
Type of lengthRange mmTolerance
Random length4000 to 16 000 with a range of 2000 per order item10% of sections supplied may be below the minimum for the ordered range but not less than 75% of the minimum
Mill (or ‘unspecified’) lengthAll+100 mm –0
Precision length<6000+5 mm –0
³6000 £10 000+15 mm –0
>10 000+5 mm + 1 mm/m –0
NOTE: The enquiry and order shall indicate the type of length required and the length or length range, as appropriate. Alternatively, length tolerances shall be specified at the time of order.

Our Advantages

  1. Over 25 years of experience in pipeline production and installation.
  2. Comprehensive inspection equipment.
  3. Independent product serial numbers for traceability.
  4. Advanced production equipment – Seamer high-frequency welding machine from the United States.
  5. Complete qualifications – API 5L/API 5CT/FM/UL fire pipe certification, etc.
  6. Wide range of products – independently developed solar torque tubes, highly favored in the European market.
  7. Customers spread across the globe.
  8. Excellent after-sales service and sense of responsibility.

Application Scenarios

Our steel pipes are engineered to withstand high temperatures, corrosive environments, and varying pressures, ensuring reliability and safety in the complex petrochemical processes. 

Whether it’s transferring crude oil, natural gas, or chemical intermediates, the robustness and versatility of steel pipes make them indispensable components of the plant’s infrastructure, contributing to efficient production and maintenance of stringent safety standards.

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